title: Influence of toxic cyanobacteria on community structure and microcystin accumulation of freshwater molluscs.
abstract: Community structure and microcystin accumulation of freshwater molluscs were studied before and after cyanobacterial proliferations, in order to assess the impact of toxic blooms on molluscs and the risk of microcystin transfer in food web. Observed decrease in mollusc abundance and changes in species richness in highly contaminated waters were not significant; however, relative abundances of taxa (prosobranchs, pulmonates, bivalves) were significantly different before and after cyanobacterial bloom. Pulmonates constituted the dominant taxon, and bivalves never occurred after bloom. Microcystin accumulation was significantly higher in molluscs from highly (versus lowly) contaminated waters, in adults (versus juveniles) and in pulmonates (versus prosobranchs and bivalves). Results are discussed according to the ecology of molluscs, their sensitivity and their ability to detoxify.
authors.affiliation: ECOBIO, Université de Rennes 1, CNRS, Avenue du Général Leclerc, 35042 Rennes, France. claudia.gerard@univ-rennes1.fr
authors.forename: Claudia
authors.initials: C
authors.lastname: Gérard
authors.forename: Virginie
authors.initials: V
authors.lastname: Poullain
authors.forename: Emilie
authors.initials: E
authors.lastname: Lance
authors.forename: Anthony
authors.initials: A
authors.lastname: Acou
authors.forename: Luc
authors.initials: L
authors.lastname: Brient
authors.forename: Alexandre
authors.initials: A
authors.lastname: Carpentier
mesh_terms: D000818:Animals; D000458:Cyanobacteria / Q000254:growth & development* / Q000378:metabolism; D017753:Ecosystem; D005068:Eutrophication; D005247:Feeding Behavior; D005618:Fresh Water / Q000382:microbiology; D052998:Microcystins / Q000493:pharmacokinetics* / Q000494:pharmacology; D008974:Mollusca / Q000145:classification / Q000187:drug effects / Q000378:metabolism* / Q000502:physiology; D012119:Respiration / Q000187:drug effects; D012621:Seasons; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics / Q000494:pharmacology
chemical_list: D052998:Microcystins; D014874:Water Pollutants, Chemical; C078588:microcystin